Final answer:
Out of the given options, √11 is an irrational number because it cannot be expressed as a fraction and its decimal representation goes on forever without repeating.
Step-by-step explanation:
To determine which number is irrational, we need to check if it can be expressed as a fraction or if it is a non-repeating, non-terminating decimal. An irrational number cannot be expressed as a fraction and its decimal representation goes on forever without repeating.
Out of the given options, √11 is an irrational number because it cannot be expressed as a fraction and its decimal representation goes on forever without repeating.
For example, √11 ≈ 3.31662479...